Estimated minutes: 15 min
Designer: Tomoaki Hamanaka
A square pyramid with a sharply pointed apex. It can be constructed by combining four triangular pyramid units using a twisting fold. A frame-like structure forms inside the shape, giving it high structural strength.
Parents

Acute triangular pyramid
A slender triangular pyramid with a sharply elongated apex, offering strong structural stability. On its own, it is well suited for creating horn-like forms. By combining multiple units, it can be extended into solid structures such as cubes and square pyramids, making it a highly versatile structural element.